Astronomical telescopes have night vision function

Astronomical telescopes have what night vision ah, night vision instrument belongs to the photoelectric class of equipment, there must be electricity to work, night vision instrument can be divided into infrared-type, microluminescent type, pyroluminescent infrared type, common for the microluminescent type, the night vision instrument observation distance is generally in the dozens of meters to a few hundred meters,, on the maintenance of the storage requirements are very high, daytime can not be used in general, the magnifying power is not high, the distance is far away from seeing!